JP6833256B2 - Vehicle belt mall - Google Patents

Description

The present invention relates to a belt molding that is attached along the lower edge of a window opening of a vehicle door and is in sliding contact with a window plate that moves up and down in the window opening.

A window opening is provided in the vehicle door that opens and closes the opening of the vehicle body, and a window plate (window glass) is installed so as to be able to move up and down in the window opening. Further, on the lower edge of the window opening, a long belt molding is attached to the window plate by bullet contact (pressure welding in an elastically deformed state) to seal between the vehicle body panel and the window plate. Then, when the window plate moves up and down, the belt molding rubs (sliding) with the window plate in a bullet contact state, so that water and dust on the surface of the window plate are wiped off. In addition, this type of belt molding has a main body portion attached to the door panel of the vehicle door and a seal portion that comes into contact with the window plate, and the seal portion comes into contact with or slides against the window plate.

Here, if the resistance at the time of friction between the belt molding and the window plate is high, an abnormal noise is generated. Therefore, in order to reduce the resistance at the time of friction with the window plate and suppress the generation of abnormal noise, a product in which a large number of fine fibers are attached to the contact portion with the window plate in the seal portion has been conventionally developed. However, simply attaching the fiber to the contact portion with the window plate does not sufficiently reduce the resistance at the time of friction, and abnormal noise is often generated.

Therefore, for example, the following Patent Documents 1 and 2 are disclosed as belt moldings that suppress the generation of such abnormal noise. In Patent Document 1, a large number of fibers provided at the contact portion with the window plate in the seal portion are each coated with a low friction agent.

In Patent Document 2, since the functions and effects required for each of a plurality of sealing portions are different, fibers having different materials, lengths, or thicknesses are attached according to each portion, and the elastic contact state is appropriate for each portion. At the same time, it also supports the generation of abnormal noise.

Jikkenhei No. 5-44637 Re-table 2014/054757

However, coating each fiber with a low friction agent as in Patent Document 1 not only increases the cost due to an increase in the manufacturing process and material cost, but also wears the coating during use and has a friction reducing effect over time. It also has the problem of lowering.

In addition, the principle of abnormal noise generated when fibers are attached to the contact portion is not only due to resistance during friction, but also due to the stick-slip phenomenon in which the fibers are repeatedly caught and released from the window plate. is there. In the stick-slip phenomenon, the fibers are upright (almost not deformed) with respect to the window plate, so that the tips of the fibers are caught in a state of being stretched against the surface of the window plate, and the window plate is further raised and lowered in this state. By doing so, the catch is repeatedly released beyond the limit. Then, an abnormal noise is generated every time the catch of the fiber is released. Therefore, when each fiber is in a state of being easily bent, the stick-slip phenomenon is unlikely to occur. On the other hand, in Patent Document 1, although the friction coefficient is reduced, the occurrence of the stick-slip phenomenon, that is, the easiness of bending of each fiber is not paid attention to.

On the other hand, in Patent Document 2, a stable abnormal noise generation suppressing effect can be obtained by optimizing the bullet contact state for each part including the ease of bending. However, it is complicated to make the fiber material, fiber thickness, etc. different for each part.

Therefore, an object of the present invention is to solve the above-mentioned problems, and to provide a belt molding for a vehicle capable of easily and stably suppressing the generation of abnormal noise when sliding with a window plate. ..

As a means for that purpose, the present invention is a belt molding that is attached along the lower edge of the window opening of the vehicle door and is in sliding contact with a window plate that moves up and down in the window opening, and is a main body that is attached to the door panel of the vehicle door. And a seal portion that comes into contact with the window plate. The seal portion includes a contact portion formed by attaching a large number of fibers to a portion in contact with the window plate. On top of that, the attachment density of the fibers is 100 to 600 fibers / mm ² .

In the present invention, "contact" is a general term (superordinate concept) for sliding contact, bullet contact, pressure contact, contact, and the like.

It is preferable to attach a strip-shaped sheet material to which fibers are attached in advance to the contact portion of the seal portion.

Further, when a plurality of the sealing portions are formed, the attachment densities of the fibers in each of the sealing portions can be made different.

In the present invention, by setting the fiber attachment density at the contact portion within a predetermined range, the fibers are brought into an appropriate dense state. That is, since the attached fibers are densely packed to some extent, the original effect of suppressing the generation of abnormal noise can be ensured by attaching the fibers. Further, since the attached fibers are densely packed to some extent, it is possible to prevent the appearance from being deteriorated because the surface (ground surface) of the base material (seal portion) is not exposed and the appearance is covered with the fibers. On the other hand, the attached fibers are not too dense. As a result, when the belt molding (seal portion) is in sliding contact with the window plate in a bullet contact state, there is enough space for each fiber to flex appropriately, so that the stick-slip phenomenon is unlikely to occur. As a result, the generation of abnormal noise can be suppressed. In addition, since the attached fibers are not too dense, the generation of static electricity between the attached fibers and the window plate is suppressed. In this respect as well, the generation of abnormal noise can be effectively reduced. Therefore, according to the present invention, it is possible to easily and stably suppress the generation of abnormal noise when sliding with the window plate.

If a strip-shaped sheet material to which fibers are attached in advance is attached to the contact portion, the shape of the base material is not affected when the fibers are attached, so that the number of fibers attached is uniform and uniform, and the attachment density is also high. Easy to adjust.

When there are a plurality of seal portions, the elastic contact state and sliding conditions with the window plate are not necessarily the same in each seal portion. Therefore, even between the seal portions, there are places where abnormal noise is likely to occur and places where abnormal noise is unlikely to occur. Therefore, if the attachment density of the fibers is made different according to the susceptibility to the generation of the abnormal noise, the generation of the abnormal noise can be suppressed more effectively.

It is a side view of a vehicle door. FIG. 2 is a sectional view taken along line II-II of FIG.

Hereinafter, embodiments of the present invention will be described. The belt molding to which the present invention is applied is a belt molding that is attached along the lower edge of the window opening of the vehicle door and is in sliding contact with the window plate that moves up and down in the window opening, and is attached to the door panel of the vehicle door. All belts that have existed in the past as long as they have a main body portion and a seal portion that comes into contact with the window plate, and are provided with a contact portion in which a large number of fibers are attached to the portion of the seal portion that comes into contact with the window plate. It can be applied to moldings, and the specific shape of the belt molding is not particularly limited. In particular, in the embodiment described later, a belt molding having two seal portions is illustrated, but the number of seal portions may be one or three or more. Belt moldings are also referred to as belt moldings, weather strips and drainer seals.

The belt molding includes an outer belt molding arranged on the outside of the window plate and an inner belt molding arranged on the inside of the window plate. As shown in FIG. 1, the belt molding is attached at the lower edge of the window opening 3 of the vehicle door 1 along the front-rear direction of the vehicle. Since FIG. 1 is a side view seen from the outside of the vehicle, FIG. 1 shows the outer belt molding 10. Although the front door is shown in FIG. 1, a belt molding is attached to the rear door at the same location. The present invention can be applied to both front door and rear door belt moldings, and may be applied to only one of the belt moldings.

As shown in FIG. 2, the door panel 4 has an outer door panel 11 and an inner door panel 110. Then, the outer belt molding 10 is attached to the outer door panel 11, and the inner belt molding 100 is attached to the inner door panel 110. The inner belt molding 100 may be attached to a door trim (not shown). A window plate 5 is arranged between the outer belt molding 10 and the inner belt molding 100, and the window plate 5 moves up and down in the vertical direction by an actuator such as a motor (not shown).

The outer belt molding 10 is in contact with the outer surface of the window plate 5 to seal it. The inner belt molding 100 is in contact with the inner surface of the window plate 5 to seal it. The outer belt molding 10 and the inner belt molding 100 wipe off water droplets and foreign substances (sand, dust, dust, etc.) adhering to the surface of the window plate 5 when the window plate 5 moves up and down, and improves the visibility on the side of the occupant. Has a role to keep in.

The outer belt molding 10 has a long main body portion 15 having a substantially U-shaped cross section, and a plurality of (two in the present embodiment) sealing portions 16, 16a. The main body portion 15 has a vehicle outer side wall portion 12 and a vehicle inner side wall portion 13 arranged in parallel in the vehicle interior / outer direction with a predetermined distance from each other, and upper edges of the vehicle outer side wall portion 12 and 13 respectively. It has a connecting portion 14 to be connected. The seal portions 16 and 16a are formed so as to project from the surface of the vehicle inner side wall portion 13 of the main body portion 15 facing the window plate 5 with the belt molding attached to the vehicle door 1 toward the window plate 5. ..

In the present embodiment, the tip of the outer door panel 11 is hemmed so as to wrap around the tip of the reinforcement 17, to form the flange portion 18. Then, by inserting the flange portion 18 into the main body portion 15, the outer belt molding 10 is attached to the flange portion 18. Further, the outer belt molding 10 has an engaging portion 19 formed at the lower end of the vehicle inner side wall portion 13 and engaging with the folded end of the flange portion 18, and a holding portion protruding from the vehicle outer side wall portion 12 and abutting on the flange portion 18. It is held by the flange portion 18 by the lip 20 and the cover lip 21 that protrudes from the lower end of the outer side wall portion 12 of the vehicle and abuts on the outer door panel 11.

Further, in the present embodiment, each of the two sealing portions 16 and 16a protrudes from the upper edge and the lower edge of the vehicle inner side wall portion 13 toward the window plate 5, respectively. The seal main bodies 22 and 22a have a lip shape. Further, the seal root portions 23, 23a have a portion formed to be thinner than the seal main body portions 22, 22a, and are deformed at this thin wall portion as the window plate 5 moves up and down. Further, contact portions 24, 24a in contact with the window plate 5 are formed on the surface of the seal main body portions 22, 22a facing the window plate 5, and the contact portions 24, 24a are windows on the surface on the window plate 5 side. It has fiber layers 25, 25a for reducing the sliding resistance between the plate 5 and the sealing portions 16, 16a. Each of these fiber layers 25 and 25a is formed by attaching a large number of fibers (pile) to the surfaces of the contact portions 24 and 24a in a substantially upright state.

Further, the inner belt molding 100 also has a structure similar to that of the outer belt molding 10. That is, the inner belt molding 100 includes a main body portion 150 having a vehicle outer side wall portion 120, a vehicle inner side wall portion 130, and a connecting portion 140, and a plurality of inner belt moldings 100 projecting from the vehicle outer side wall portion 120 toward the window plate 5 (the present embodiment). The two) seal portions 160 and 160a are provided. When the main body 150 is attached to the flange 180 of the inner door panel 110, the locking portion 190 engages with the raised portion of the flange 180, and the holding lips 200, 200a and the cover lip 210 come into contact with the surface of the inner door panel 110. To do. The seal portions 160 and 160a of the inner belt molding 100 are also formed with seal root portions 230 and 230a having portions that are more easily deformed than the seal body portions 220 and 220a and contact portions 240 and 240a that come into contact with the window plate 5. Has been done. Fiber layers 250 and 250a to which a large number of fibers are attached are formed on the contact portions 240 and 240a, respectively. Interior materials such as door trims (not shown) are arranged inside the inner belt molding 100 of the present embodiment.

Further, the main body portions 15, 150 of the outer belt molding 10 and the inner belt molding 100 are made of a material that can be molded by extrusion molding, injection molding, or the like. For example, thermoplastic elastomers, thermoplastic resins, rubber and the like can be used. Specific examples thereof include olefin-based thermoplastic elastomer (TPO), styrene-based elastomer (TPS), vinyl chloride resin (PVC), polypropylene resin (PP), ethylene-propylene-diene copolymer (EPDM), and the like. .. As a material for forming the main body portions 15, 150, a material having a durometer hardness (type D) of HDD 50 to 80 according to JIS K7215 is preferably used.

The seal portions 16, 16a, 160, 160a of the outer belt molding 10 and the inner belt molding 100 can be molded by extrusion molding, injection molding, or the like, and are made of a material that is softer and elastically deformable than the main body portions 15, 150. For example, thermoplastic elastomers, thermoplastic resins, rubber and the like can be used. Specific examples thereof include olefin-based thermoplastic elastomer (TPO), styrene-based elastomer (TPS), vinyl chloride resin (PVC), polypropylene resin (PP), ethylene-propylene-diene copolymer (EPDM), and the like. .. As a material for forming each of the seal portions 16, 16a, 160, 160a, a material having a durometer hardness (type A) of HDA50 to 90 according to JISK7215 is preferably used.

The holding lips 20, 200, 200a of the main bodies 15, 150, the cover lips 21, 210, the flanges 18, 180, and the parts that come into contact with the interior material are also formed of the same material as the sealing parts 16, 16a, 160, 160a. ing.

A core material made of metal or hard resin is embedded in the main bodies 15 and 150 of the outer belt molding 10 and the inner belt molding 100 in order to secure the holding force when attached to the flange portions 18 and 180. You may. In this case, the main bodies 15, 150 can also be formed by covering the periphery of the core material with an elastically deformable material having the same hardness as the sealing portions 16, 16a, 160, 160a.

In the outer belt molding 10 and the inner belt molding 100, the main body portions 15, 150 and the sealing portions 16, 16a, 160, 160a are integrally molded by coextrusion molding, and the contact portion 24 is formed at the same time as extrusion molding or after extrusion molding. , 24a fiber layers 25, 25a are molded. Then, processing for attaching the outer belt molding 10 and the inner belt molding 100 to the vehicle door 1 is performed, such as pressing of both terminals in the longitudinal direction and mounting of accessory parts such as clips.

There are at least two seal portions for each of the outer belt molding 10 and the inner belt molding 100, and they are arranged substantially parallel to each other in the vertical direction along the main body portions 15 and 150. On top of that, the upper sealing portions 16 and 160 are provided with contact portions 24 and 240 and fiber layers 25 and 250 that come into contact with the window plate 5. Further, the lower sealing portions 16a and 160a are provided with contact portions 24a and 240a and fiber layers 25a and 250a that come into contact with the window plate 5.

These fiber layers 25, 25a, 250, 250a can be attached by any method such as attaching a large number of fibers by electrostatic flocking or spraying, or attaching a strip-shaped sheet material to which fibers are attached in advance to a tape. Can be formed with. A plurality of these attachment methods can be used in combination. For example, a sheet material is attached to the upper sealing portions 16 and 160 to form fiber layers 25 and 250, and the fiber layers 25a and 250a are directly formed on the lower sealing portions 16a and 160a by electrostatic flocking. You can also. The fiber layers 25, 25a, 250, 250a made of a sheet material are typically formed by applying an adhesive to a tape and adhering a large number of fibers on the tape in a standing state due to static electricity or the like. Will be done.

In addition, among a large number of fibers constituting the fiber layers 25, 25a, 250, 250a, fibers standing upright from the base material and fibers in an obliquely inclined state are mixed. When the fibers are electrostatically transplanted, the number of upright fibers tends to increase as the applied charge is increased, and the number of inclined fibers tends to increase as the charge is weakened. In addition, the use of a sheet material to which the fibers have been attached in advance is not affected by the shape of the base material when the fibers are attached, rather than directly attaching the fibers to the base material by electrostatic flocking. There is little variation in the number of attachments and it is uniform, and the attachment density is easy to adjust.

When a sheet material to which fibers are attached in advance is attached at the same time as extrusion molding of the outer belt molding 10 and the inner belt molding 100, it is of the same type as the sealing portions 16, 16a, 160, 160a, which are the attachment points, or has good compatibility. It is preferable to use a tape made of a material. For example, when the sealing portions 16, 16a, 160, 160a are formed of TPO, it is preferable to use a tape made of an olefin resin. As a result, the tape can be heat-welded by the residual heat immediately after molding of the sealing portions 16, 16a, 160, 160a. Further, the sheet material can be adhered to the sealing portions 16, 16a, 160, 160a by applying an adhesive. Further, heat welding and application of an adhesive can be used in combination.

The length of each fiber forming the fiber layers 25, 25a, 250, 250a may be within the range conventionally generally used in this type of belt molding. Specifically, those having a thickness of 0.3 to 1.0 mm, preferably 0.4 to 0.8 mm are used. It should be noted that the longer the fiber length is within this range, the easier it is to bend, which is advantageous in suppressing abnormal noise. On the contrary, if the length of the fiber is too short, the fiber layers 25, 25a, 250, 250a are difficult to bend and come into contact with the window plate 5 accurately, and there is a possibility that abnormal noise is likely to occur when the window plate 5 is raised and lowered. There is. On the other hand, if the length of the fiber is too long, the sound insulation may be lowered.

The thickness of each fiber may also be within the range generally used conventionally in this type of belt molding. Specifically, 1.0 to 4.5 decitex (also referred to as dtex), preferably 1.5 to 3.5 decitex is used. If the thickness of the fiber is as thin as possible within this range, it is easy to bend, which is advantageous for suppressing abnormal noise and has good sound insulation. On the contrary, if the thickness of the fiber is too thick, it is difficult to bend, and it is easy to be caught by the window plate 5, and there is a possibility that an abnormal noise is likely to be generated when the window plate 5 is raised and lowered. In addition, the sound insulation may be reduced. On the other hand, if the fiber thickness is too thin, the durability may decrease.

“Decitex” is a unit based on JIS L 0101 and L 0104, which means a weight per unit length, and is usually used as a unit indirectly expressing the thickness of a fiber. The fiber layers 25, 25a, 250, 250a in FIG. 2 are schematically shown with emphasis over the actual thickness, and the actual thicknesses of the fiber layers 25, 25a, 250, 250a are shown in FIG. It does not always match what you did.

As the material of the fiber, a polyamide resin such as nylon, a polyester resin, a polypropylene resin, an acrylic resin, an aramid resin, a fluorine resin, or the like can be used. For example, if a material such as nylon that does not easily generate static electricity on the window plate 5 (glass) is used, it is difficult for an adsorption force to act between the fiber and the window plate 5, which is advantageous in suppressing the generation of abnormal noise.

On that basis, the attachment density of the fibers is at least 100 to 600 fibers / mm ² , preferably 150 to 550 fibers / mm ² , and more preferably 180 to 500 fibers / mm ² . If the attachment density ^{of the fibers is less than 100 fibers / mm 2} , the fiber layers 25, 25a, 250, 250a cannot effectively exert their functions, so that abnormal noise is likely to occur, and the sealing portions 16, 16a, 160, 160a There is a risk that the background (surface) of the belt molding will be easily exposed through the fiber layers 25, 25a, 250 and 250a, and the appearance of the belt molding will be deteriorated. On the other hand, when the attachment density of ^{the fibers exceeds 600 fibers / mm 2} , the fibers are too densely packed, so that the fibers are less likely to bend when sliding with the window plate 5, and abnormal noise is likely to occur.

When there are a plurality of seal portions, the elastic contact state and sliding conditions with the window plate 5 are not necessarily the same in each seal portion. Therefore, even between the seal portions, there are places where abnormal noise is likely to occur and places where abnormal noise is unlikely to occur. Therefore, if the attachment density of the fibers is made different according to the susceptibility to the generation of the abnormal noise, the generation of the abnormal noise can be suppressed more effectively.

Further, since each fiber is minute as described above, it is difficult to actually count the number of attached fibers. Therefore, after measuring the weight (unit weight) of one fiber and the weight of the belt molding before attaching the fiber in advance, the weight of the belt molding before attaching the fiber is subtracted from the weight of the belt molding after attaching the fiber. The total number of attached fibers can be calculated by obtaining the total weight of the attached fibers and dividing (dividing) the total weight of the attached fibers by the unit weight of the fibers. Further, the fiber attachment density per unit area can be calculated by dividing the number of fibers attached by the fiber attachment area. The fiber attachment density in the present invention is based on the value calculated by such calculation.

Next, examples of the present invention will be described. Fibers are attached to the contact portion of the belt molding of the same type as the belt molding shown in FIG. 2 described above at various attachment densities, and the window plate and the contact portion are slidably contacted under the following conditions to perform a sliding test. Was done. The presence or absence of abnormal noise at that time and the standard deviation of the sliding waveform were determined. The results are shown in Table 1. The following fibers and fiber layers were used.
Fiber: Material; Polyester, Length: 0.5 mm, Thickness: 1.7 decitex Fiber layer: Sheet material with fibers pre-attached to polypropylene tape at the adhesion density shown in Table 1 by electrostatic flocking.

(Sliding test conditions)
Window board: New glass (dry surface)
Sliding speed; 100 mm / s
Sliding stroke; 200 mm

The sliding waveform is the displacement amount (the amount of movement of one object relative to the other object) of two objects that are in sliding contact with each other (rubbing against each other) on the horizontal axis, and is between the two objects when they are in sliding contact with each other. It means a graph obtained when data is plotted with the amount of change in the generated frictional force as the vertical axis.
The standard deviation of the sliding waveform means a numerical value indicating the magnitude of the variation in the data forming the sliding waveform, and the lower the standard deviation of the sliding waveform, the less likely the stick-slip phenomenon to occur and the abnormal noise. The occurrence is suppressed.

From the results in Table 1, in Examples 1 to 3, no abnormal noise was generated and the standard deviation of the sliding waveform was low because the fiber attachment density at the contact portion was in a suitable range. On the other hand, in Comparative Example 1, since the fiber attachment density at the contact portion was too high, abnormal noise was generated and the standard deviation of the sliding waveform was also high.

1 Vehicle door 3 Window opening 5 Window plate 10 Outer belt molding 11 Outer door panel 12.120 Car outer side wall 13/130 Car inner side wall 14.140 Connecting part 15/150 Main body 16 / 16a / 160 / 160a Sealing part 18 180 Flange 19/190 Engagement 20/200 Holding lip 22 / 22a / 220 / 220a Seal body 24 / 24a / 240 / 240a Contact 25 / 25a / 250 / 250a Fiber layer 100 Inner belt molding 110 Inner door panel

Claims (3)

A belt molding that is attached along the lower edge of the window opening of a vehicle door and is in sliding contact with a window plate that moves up and down in the window opening.
The main body attached to the door panel of the vehicle door and
It has a seal portion that comes into contact with the window plate.
The seal portion includes a contact portion in which a large number of fibers are attached to a portion in contact with the window plate.
A belt molding having an attachment density of 100 to 600 fibers / mm ^2. The belt molding according to claim 1, wherein a strip-shaped sheet material to which fibers are attached in advance is attached to the contact portion of the seal portion. A plurality of the seal portions are formed, and the seal portion is formed.
The belt molding according to claim 2, wherein the attachment densities of fibers in each of the sealing portions are different.

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